Deskripsi Mineral dalam Deret Bowen

Nama : Adelia Irna Santika NIM

: 115.150.048

PLUG : 9

THE DESCRIPTION of THE MINERALS in the BOWEN REACTION SERIES 1. Name : Olivine Composition : (Mg,Fe)2SiO4 Hardness : 6,5 Description : Green, Streak white, Translucent, Vitreous, plate 13. Orthorhombic, tabular, poor, Occurs in igneous rocks rich in Mg or Fe. 2. Name : Hornblende Composition : NaCa2(Mg,Fe.Al)5(Si8O22)(OH,F)2 Hardness : 5-6 Description : Dark grren to black, sometimes brownish, streak white to grey, vitreous, monoclinic amphibole, prismatic, bladed, good intersecting, common in igneous and methamophic rocks. 3. Name : Biotite Composition : K(Mg,Fe)3(AlSi3O10)(OH)2 Hardness : 2,5-3 Description : Brown to black, atreak white to grey, Vitreous, pearly, monoclinic silicate sheet structure, perfect, common mica, a paler coloured Mg mica is called phlogopite. 4. Name : Muscovite Composition : KAl2(AlSi3O10)(OH)2 Hardness : 2,5 Description : Colourless, streak white, vitreous, pearly, monoclinic, silicate sheet structure, perfect, flexible elastic sheets, common rock forming mineral, used fpr electrical insulation. 5. Name : Quatrz Composition : SiO2 Hardness :7 Description : Colourless, white, coloured by impurities, plate 4, streak white, vitreous, trigonal, hexagonal columnar habit, massive, conchoidal fracture, common rock and vein forming mineral. 6. Name : Anortite Composition : CaAl2SiO8 Hardness : 6-6,5 Description : White, grayish, Redness, Transparent, Translusan, Opaq, Vitreous Bias Index: 1573 -1590, triclinic – Pinacoida. 7. Name : Labradorite Composition : Na (AlSi3O8) Ca (Al2Si2O8) Hardness : 6-6,5 Description : Grey, Black, Translucent, Opaque, luster glass, triclinic. 8. Name : Andesine Composition : (Na, Ca) [Al (Si, Al) Si2O8] Hardness : 6-6,5 Description : Red, White, Green, Transparent to Translucent, Subitreous to pearly Index Bias: 1543 -1562, triclinic – Pinacoidal. 9. Name : Albite Composition : Na (AlSi3O8) Hardness : 6-6,5

Description : White to Gray, Bluish, greenery, redness, Colorless, transparent to translusant, Viterious, Pearly, triclinic – Pinakonidal. 10.Name : Oligoclase Composition : (Na,Ca) AlSi3O8 Hardness : 6-6,5 Description : opaque white or grayish-white, green, yellow or brown, flash glass, Transclucent-transparent, has a first direction and fractional parts konkoidal. 11.Name : Bitownite Composition : (Al,Si) AlSi2O8 Hardness : 6-6,5 Description : white, gray and even colorless (colorless), luster glass, white drain, transparent-opaque, have different parts of the first direction, and fractional konkoidal 12.Name : Pyroxene Composition : (Ca,Na)(Mg,Fe,Al)(Si,Al)2O6 Hardness : 5 - 6,5 Description : white, shiny glass, drain the white, short prismatic, translucentopaque.

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http://pusakadunia.com/blog/6087/ http://younggeolog.blogspot.co.id/2012/12/plagioklas.html http://franzbonbon.blogspot.co.id/2011/04/mineral-piroksen.html J,W, Philips, N. 1980. An Introduction to Mineralogy for Geologist. New York : John Wiley & Sons.